GR translation: scarlet VD toilet

[Mike Jing]

V452.17-24    Coefficients, ja, ja. . . . Achtfaden flings himself
disconsolately on the scarlet VD toilet way down at the very end of the
row. He knows about coefficients. In Aachen once, for a while, he and his
colleagues could stand in the forward watchtower: look out into the country
of the barbarians through Hermann and Wieselsberger’s tiny window. Terrific
compressions, diamond shadows writhing like snakes. Often the sting was
bigger than the model itself—the very need to measure interfered with the
observations. That should have been a clue right there.

What does the "VD" stand for in "scarlet VD toilet"?
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